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Arcjet · Concept

Capacity

Use an Arcjet token bucket to limit AI tokens per user. Estimate each request's token cost, charge it to the user's bucket, and deny requests when the bucket is empty.

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Syntax

arcjet.TokenBucket(arcjet.TokenBucketOptions{Mode, Characteristics, RefillRate, Interval, Capacity})
aj.Protect(ctx, request, arcjet.WithRequested(tokens), arcjet.WithCharacteristics(values))

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  • TokenBucket
  • TokenBucketOptions
  • WithRequested
  • WithCharacteristics
  • Protect
  • ModeLive
  • fixed window
  • sliding window

Source: AI budget control for Go | Arcjet Docs. Checked 2026-11-03.